Back & Shoulder Muscles Flashcards
(33 cards)
Trapezius
Origin: vertebral column Insertion: scapula & lateral clavicle Action: elevation, depression, lateral rotation, and retraction of scapular Innervation: spinal accessory Perfusion: transverse cervical
Latissimus dorsi
Origin: vertebral column, thoracodorsal fascia, iliac crest
Insertion: anterior humerus
Action: extension, medial rotation, and adduction of arm
Innervation: thoracodorsal
Perfusion: thoracodorsal
Rhomboid major
Origin: vertebral column
Insertion: medial border of scapula, below spine
Action: medial rotation and retraction of scapula
Innervation: dorsal scapular
Perfusion: dorsal scapular
Rhomboid minor
Origin: vertebral column
Insertion: medial border of scapula, at spine
Action: medial rotation and retraction of scapula
Innervation: dorsal scapular
Perfusion: dorsal scapular
Levator scapulae
Origin: vertebral column Insertion: medial border of scapula, above spine Action: elevation of scapula Innervation: dorsal scapular Perfusion: dorsal scapular
Iliocostalis
Origin: iliac crest and vertebral column Insertion: ribs Action: extension and lateral flexion of vertebra Innervation: dorsal rami Perfusion: N/A
Longissimus
Origin: transverse processes Insertion: transverse processes Action: extension and lateral flexion of vertebra Innervation: dorsal rami Perfusion: N/A
Spinalis
Origin: spinous processes Insertion: spinous processes Action: extension and lateral flexion of vertebra Innervation: dorsal rami Perfusion: N/A
Deltoid
Origin: clavicle and scapula
Insertion: deltoid tuberosity of humerus
Action: abduction to 90, flexion/extension, and medial/lateral rotation of arm
Innervation: axillary nerve
Perfusion: posterior humeral circumflex artery
Supraspinatus
Origin: scapula Insertion: greater tubercle of humerus Action: abduction to 15 of arm Innervation: suprascapular nerve Perfusion: suprascapular artery
Infraspinatus
Origin: scapula Insertion: greater tubercle of humerus Action: lateral rotation of arm Innervation: suprascapular nerve Perfusion: suprascapular artery
Teres minor
Origin: scapula Insertion: greater tubercle of humerus Action: lateral rotation of arm Innervation: axillary nerve Perfusion: posterior humeral circumflex artery
Teres major
Origin: scapula Insertion: lesser tubercle of humerus Action: extension, medial rotation, and adduction of arm Innervation: lower subscapular nerve Perfusion: scapular circumflex artery
Pectoralis major
Origin: sternum and clavicle
Insertion: deltoid tuberosity of humerus
Action: flexion, medial rotation, and adduction of arm
Innervation: lateral and medial pectoral nerves
Perfusion: thoracoacromial artery (pectoral branch)
Pectoralis minor
Origin: ribs
Insertion: coracoid process
Action: protraction and depression of scapula
Innervation: medial pectoral nerve
Perfusion: thoracoacromial artery (pectoral branch)
Subscapularis
Origin: scapula
Insertion: lesser tuberosity of humerus
Action: medial rotation and adduction of arm
Innervation: upper and lower subscapular nerves
Perfusion: subscapular artery
Serratus anterior
Origin: ribs Insertion: medial border of scapula Action: abduction above 90, lateral rotation, and protraction of scapula Innervation: long thoracic nerve Perfusion: lateral thoracic artery
Elevation of scapula
Trapezius
Levator scapulae
Depression of scapula
Trapezius
Pectoralis minor
Protraction of scapula
Serratus anterior
Pectoralis minor
Retraction of scapula
Trapezius
Rhomboid major
Rhomboid minor
Lateral rotation of scapula
Trapezius
Serratus anterior
Medial rotation of scapula
Rhomboid major
Rhomboid minor
Flexion of arm
Deltoid
Pectoralis major
Biceps
Coracobrachialis
